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MaterialsTypes of 3D Printing Plastic3D Printing in Resin (DLS)

3D Printing in Resin (DLS)

3D printing in Carbon DLS™ resins offers something that many material and machine manufacturers strive for: the ability to manufacture both prototypes and high-quality production parts using the same common materials and the same process. Read on to learn more about the wide range of available DLS photopolymers.

Carbon DLS RPU 70 rigid polyurethane

About 3D Printing in Resin (DLS)

Parts made from DLS materials make use of the CLIP (Continuous Liquid Interface Production) process. To the outside observer, the production looks similar to standard photopolymer printing (similar to SLA 3D printing) but it uses a far more complex process to achieve high-quality parts, including a curing stage after printing. The increased complexity of DLS printing means that it can use a wide array of engineered materials and all parts are isotropic. This allows for unique applications in cost-effective, advanced materials that have not been traditionally possible with other printing technologies.

3D Printed DLS at a Glance

DLS UMA 90

This is a rigid, general-purpose photopolymer that has similar properties to normal SLA resins. It is ideal for jigs and fixtures. UMA 90 parts can be printed in a wide variety of custom colors allowing for many options when creating visual prototypes.

DLS UMA 90 (Urethane Methacrylate)
Tensile Strength (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (℃)Impact Strength Notched (kJ/m2)
Tensile Strength (MPa)

46

Elongation at Break (%)

17

Hardness (Shore D)

86

Heat Deflection Temperature (℃)

51

Impact Strength Notched (kJ/m2)

0.033

DLS EPX 82 (Epoxy)

This is an epoxy-based photopolymer that offers excellent strength, durability, and toughness. Its strength is comparable to that of glass-filled thermoplastics. Its applications can include brackets and connectors.

DLS EPX 82 (Epoxy) Properties
Tensile Strength (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (℃)Impact Strength Notched (kJ/m2)
Tensile Strength (MPa)

82

Elongation at Break (%)

5.9

Hardness (Shore D)

89

Heat Deflection Temperature (℃)

130

Impact Strength Notched (kJ/m2)

0.044

DLS CE 221 (Cyanate Ester)

This is an advanced material that offers extremely high temperature and chemical resistance. This makes it ideal for applications that include exposure to corrosive fluids at high temperatures and pressures such as compressor screws or fluid manifolds. 

DLS CE 221 (Cyanate Ester) Properties
Ultimate Tensile Strength (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (℃)Impact Strength Notched (kJ/m2)
Ultimate Tensile Strength (MPa)

92

Elongation at Break (%)

3.3

Hardness (Shore D)

92

Heat Deflection Temperature (℃)

231

Impact Strength Notched (kJ/m2)

0.015

DLS RPU 70 (Rigid Polyurethane)

This material is a rigid polyurethane with typical thermoset plastic benefits such as good impact resistance, durability, and relatively high-temperature resistance. Some applications can include push-in rivets or equipment housings.

DLS RPU 70 Properties
Ultimate Tensile Strength (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (℃)Impact Strength Notched (kJ/m2)
Ultimate Tensile Strength (MPa)

35

Elongation at Break (%)

100

Hardness (Shore D)

77

Heat Deflection Temperature (℃)

120

Impact Strength Notched (kJ/m2)

0.075

DLS FPU 50 (Flexible Polyurethane)

This flexible polyurethane exhibits excellent abrasion, fatigue, and impact resistance. These properties make it ideal for applications that undergo multiple load/unload cycles like living hinges or friction fits.

DLS FPU 50 Properties
Ultimate Tensile Strength (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (℃)Impact Strength Notched (kJ/m2)
Ultimate Tensile Strength (MPa)

25

Elongation at Break (%)

200

Hardness (Shore D)

71

Heat Deflection Temperature (℃)

70

Impact Strength Notched (kJ/m2)

0.04

DLS EPU 40 (Elastomeric Polyurethane)

This polyurethane is highly elastic and is comparable to other conventional casting thermosetting elastomers. Its energy-return properties are excellent, and it performs better in terms of tear strength and elongation than most similar materials. These properties make it perfect for vibration isolation or sealing applications.

DLS EPU 40 Properties
Tensile Strength (MPa)Elongation at Break (%)Hardness (Shore A)Heat Deflection Temperature (℃)Tear Strength (kN/m)
Tensile Strength (MPa)

7.7

Elongation at Break (%)

> 250

Hardness (Shore A)

68

Heat Deflection Temperature (℃)

10

Tear Strength (kN/m)

20

DLS SIL 30 (Silicone)

This material exhibits low hardness ratings but high tear resistance. Thanks to these properties, plus its biocompatibility, this material is ideal for consumer products like wearables, headphones, and other items that come into regular contact with skin.

DLS SIL 30 (Silicone) Properties
Ultimate Tensile Strength, (MPa)Elongation at Break (%)Hardness (Shore A)Glass Transition Temperature (℃)Tear Strength (kN/m)
Ultimate Tensile Strength, (MPa)

3.5

Elongation at Break (%)

350

Hardness (Shore A)

35

Glass Transition Temperature (℃)

10

Tear Strength (kN/m)

10

Finishes

Materials intended for 3D printing in DLS resin—especially the softer elastomeric types—do not typically lend themselves to many surface finishes.


  • Standard: DLS parts ordinarily come off the machine with a matte or semi-glossy appearance. The specific appearance depends on the feature direction as well as the type of material.
  • Custom color: Only UMA 90 allows for custom color mixing; it typically comes in black or white.

SLS selective laser sinter nylon dyed blue part

Cost-saving Design Tips

To reduce expenditures when 3D printing in DLS, follow these cost-saving design tips:


  • DFM: DLS 3D printing technology requires special considerations when designing parts. Avoid creating internal voids and build drainage holes into the design to allow excess resin to be evacuated after printing.
  • Choose the right resin: Each of the above resins are well-suited to certain applications. If prototyping is the goal, then UMA 90 is ideal. If a soft, skin-contacting product is required, then the DLS SIL 30 is better suited. Selecting the best material for the job will reduce the number of finishing operations you need to perform to make the part perform its intended function.
    FDM 3d print large part mail tray box
    Instant Quoting Engine

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